package practice_3_2;
//计算1/1-1/2+1/3-1/4+1/5 …… + 1/99 - 1/100 的值
public class Test01 {
    public static void main(String[] args) {
        double ret = 0;
        for(int i = 1; i <= 100; i++){
            //i为奇数加
            if(i % 2 == 0){
                ret += 1.0 / i;
            }else { //i为偶数减
                ret -= 1.0 / i;
            }
        }
        System.out.println("ret = " + ret);
    }
}
